Patent · US Active

Composite filter media

US8512432B2 · kind B2 · utility

8Cited by

28References

23Claims

0Family size

Inventors

David Jones · Bellevue, US
Hyun Sung Lim · Midlothian, US

Key dates

Filing date	Aug 1, 2008
Grant date	Aug 20, 2013
Priority date	—
Expiry date	Apr 28, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24942
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A composite filter media structure includes, in an exemplary embodiment, a base substrate that includes a nonwoven synthetic fabric formed from a plurality of fibers with a spunbond process. The base substrate has a filtration efficiency of about 35% to less than 50%, measured in accordance with EN 1822 (1998) test procedure A nanofiber layer is deposited on one side of the base substrate. The composite filter media structure has a minimum filtration efficiency of about 70%, measured in accordance with EN 1822 (1998) test procedure.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.